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1 2 1,630,044 May 24 9 7 R. E. wiLsoN FURNACE FOR THE TREATMENT OF SPBNT FULLERS EARTH Filed Febjzs, 1924 2 sheets-snee: 1

y Y@ W QM/M lli' l 1 l ...mu-*mun- 1,630,044 v May 24 14927' R; E. WILSON FURNACE FOR THE TREATMENT OF SPENT FULLERS EARTH Filed Feb.2s. 1924 2 sheets-sheet 2 l Patented May. 24, 1 927.

ROBERT E. WILsojlsT;l orcmcaeo, ILLINOIS, AssIrIvoIrTo"saraivrmruiy oIL coiisrrANY,Y

e n, g 1,630,044 v*PAT ENT" QFFICE' i on wammagimmam, A CORPORAHON101,1 INDIANA- y UBNACE vFOR"` THE TREATMENT or sPENT IULLERs-EABTH.,

' Application filed February 273, 1924. Serial No. 694,776.

understood from thefollowing description,

illustrated by the accompanying drawings 1n which: i

Figures 1a and 1b together show in side,`

elevation a rotary kiln constructed in .accordance with the invention, Fig. 1a showing the end'connected with a stack and Fig. 1b showing the opposite end;

Fig. 2 is an end elevation of ly broken away; and

Fig. 3 is a vertical sectional View through the end of the kiln shown in Fig. 2.

Referring more particularly to the drawings, the numeral 5 indicates the shell of a rotary kiln, mounted inthe vusual manner upon rollers 6 and driven by asuitable prime operating through lan encirclinggear. At 011e end the shell of the kiln rotates in a head 8 secured in a suitable flue or stack setting 9. A suitable chute 10 or other means .is provided atthis end of the the kilny partifurnace for the supply of the spent fullers earth to be treated thereto.

The Vrotary furnace is downwardly in cliued from this end, and at its opposite end is rotatably'nionnted in acasing or support 12, which yreceives the material upon. discharge from the furnace vand in turn discharges it through a chute or opening 13. An opening 14 is provided in the casing for the introduction of a suitable heating means, for example, a gas or oil burner.

At one sideof the opening 14 and some-` what below it a pipe 15 passes through the head of the casing 12 and extends into the rotary furnace-for substantially the entire lengthv thereof, and is substantially parallelr to its axis. At. intervals branch pipes 16 are drawn off from the pipe 15 and extend downwardlyrto the'lower side of the shell, and thence along the interior surface of the shell in the direction thereof and in plane's substantially perpendicular to its axis. These pipes are capped at their ends and are provided With perfor-ations on their lower surfaces. They are sodisposed as to lie in the bed of material formed in the furnace during the operation thereof and 4are spaced at their ends by the pipe 16a. This vbonaceous matter contained therein.

bed is maintained by Vmeans of the annular platey 17 secured to the rotary kiln vat its discharge end. ,As shown in Fig. 2 the bed banks up on one/side, and the -perforations of the pipes 16 are normally located Within the banked bed. 1

Inthe operation of the kiln, spent fullers earth,l or similar material to be calcined is fedrin continuously through the chute 10 and travels gradually through the rotating kiln of the furnace, which is rotated by means of the prime mover 7 at any desirable rate. The annular plate 17 at the discharge end of the furnace serves to maintain a bed of the material Within the furnace, this bed covering the perforated pipes 16. The annular plate 17 may be six to sov eight inches in Width, thereby maintaining a. corresponding depth of material in therotating furnace. Airis forcedA in through the pipe 15 and the distributing pipes 16, a vsuitable pressure being from five to ten pounds. The air violently agitates the fullers earth being calcined and materially aids in the combustion and removal of thecar- The calcining material is brought toa temperature'preferably not in excess of'1500o F., `and suitably from 1100 to 1300o by the heating means' (not shown) lintroduced through amountof heating medium required is maf terially reduced. The pipes 16 are spaced apart at suitable intervals; for example, intervals of 6 to 1.2 inches have been found satisfactory in a five foot rotary kilnor furnace. Y

kI claim:

1. A rotary furnace comprising an. inclinedvrotatable shell, means for rotating the shell, means for supplying spent fullers earth atrthe upper end thereof, means for supplying heat internally within said shell, 4an air conduit leading into .the shell and a distributing pipe leading from said conduit to lthe lower side of the shell and thence in close proxin'iityto the Wallthereofin the i direction of-rotation of the shell, said distributing pipe being provided with perforations in the portion normally covered withk at thev upper end thereoff, anvannular plate at the. lower.v end of the shell for maintaining a body of treated material therein,means .for supplying a heat-ing medium Within ythe shell',` an air pipe extending longitudinally Within the Shell and a plurality of distributing pipes leading from-Said air pipeflo -the lower yside of the shell and thence in Close proximity to the Wall th'ereoi1 in the direction of rotation of the shell, said distributaing pipes being provided with perforalions iu the portions normally covered Wilalrthe ullers earth.

ROBERT E. VILSON, 

